op 	 {
  name: "XlaSendToHost"
  input_arg {
    name: "input"
    type_attr: "Tinput"
  }
  attr {
    name: "Tinput"
    type: "type"
  }
  attr {
    name: "key"
    type: "string"
  }
  is_stateful: true
}
